Speaker and sound diffuser thereof
This application provides a speaker and a sound diffuser thereof. The sound diffuser includes a first diffusion surface and a second diffusion surface. The first diffusion surface faces toward a first driver, and has a first central area that is a circular protrusion, a first outer ring region, and a first concave ring region located between the first central area and the first outer ring region. The second diffusion surface faces toward a second driver, and is a circular dish surface protuberant from center outwards. The sound diffuser is coaxially located between the first driver and the second driver, and the first driver and the second driver respectively generate different sound production frequencies.
Latest TYMPHANY ACOUSTIC TECHNOLOGY (HUIZHOU) CO., LTD. Patents:
- Passive horn integrally formed by using thermoplastic vulcanized rubber and preparation method thereof
- Firmware upgrade for wireless stereo earbuds
- Passive horn integrally formed by using thermoplastic vulcanized rubber and preparation method thereof
- Headphone assembly and headphone controlling method
- Diaphragm for loudspeaker
This application relates to a speaker and a sound diffuser thereof, and in particular, to a speaker that has both a tweeter and a woofer and a sound diffuser thereof.
Related ArtA sound diffuser is used for a driver of a loudspeaker, and is used to change sound transmission paths that are various of frequency ranges and that are generated by different drivers. It helps better radiating sounds to a free field around a loudspeaker, thereby increasing sound pressure levels and sound radiation efficiency in various frequency bands with 360 degrees directions.
Currently, loudspeakers with sound diffusers are basically designed with corresponding drivers for different sound frequency bands. It separately designs corresponding sound diffusers and dedicated sound production space locations. Generally, a sound radiation surface of a bass sound diffuser is mainly a spherical surface, and a sound radiation surface of a treble sound diffuser is mainly a pointed cone surface. As shown in the GB2459338A, sound production spaces of treble and bass speakers are separately designed, so that there is a distance between a treble sound production space and a bass sound production space.
However, when a loudspeaker with a plurality of drivers integrated into a box needs to be designed, if each driver respectively has one sound production space, a relatively large space of the loudspeaker is occupied. This is not acceptable for a speaker that has a limited space. Therefore, a sound diffuser shared by a plurality of drivers needs to be developed, and a speaker system needs also to be improved to achieve an optimal acoustic characteristic.
SUMMARYIn view of this, this disclosure provides a sound diffuser used in a speaker. The sound diffuser is coaxially located between a first driver and a second driver, and the sound diffuser includes a first diffusion surface and a second diffusion surface. The first diffusion surface faces toward a first driver, and has a first central area that is a circular protrusion, a first outer ring region, and a first concave ring region located between the first central area and the first outer ring region. The second diffusion surface faces toward a second driver, and is a circular dish surface protuberant from center outwards.
This disclosure further provides an embodiment, where the second diffusion surface has a second central area, which is a circular protrusion, and a diameter of the first central area of the first diffusion surface is greater than the second central area of the second diffusion surface.
In an embodiment, the second diffusion surface has a second concave ring surface, and a diameter of the second concave ring surface is less than a diameter of the first concave ring region of the first diffusion surface.
This disclosure further provides an embodiment, where the second diffusion surface has a second central area, which is protuberant in a pointed cone.
In an embodiment, the second diffusion surface has a second central area, which is protuberant in a straight cone.
This disclosure further provides an embodiment, where the second diffusion surface has a second central area, which is protuberant in a circular convex cone.
In an embodiment, the sound diffuser is hollow, and the first diffusion surface has a plurality of openings.
In another embodiment, inner surfaces or outer surfaces of the plurality of openings of the first diffusion surface have damping layers.
This disclosure further provides a speaker, including a first driver, a second driver, and the sound diffuser according to embodiments of this application. A sound production frequency of the second driver is different from that of the first driver. The sound diffuser includes a first diffusion surface and a second diffusion surface. The first diffusion surface faces toward a first driver, and has a first central area that is a circular protrusion, a first outer ring region, and a first concave ring region located between the first central area and the first outer ring region. The second diffusion surface faces toward a second driver, and is a circular dish surface protuberant from center outwards.
The speaker and the sound diffuser thereof according to the embodiments of this application can enable sound production spaces of the first driver and the second driver to become smaller, and can still simultaneously diffuse sound waves that are from the first driver and the second driver. A single sound diffuser can reduce mutual impact between sound fields in the sound production spaces of the first driver and the second driver to the minimum, and can improve a direction of a sound (for example, traveling in a horizontal direction), to achieve an optimal acoustic characteristic for a speaker.
The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and where:
To facilitate reading, this document points out “upper”, “lower”, “left”, and “right” according to the figures. Its objective is to point out relative reference locations of components, but not to limit this application.
The first driver 10 is disposed inside a hollow first cavity 11, the second driver 20 is disposed inside a hollow second cavity 21, and the sound diffuser 30 is disposed between the first cavity 11 and the second cavity 21. The sound diffuser 30 to be coaxially disposed between the upper first driver 10 and the lower second driver 20. For the convenience of description, a support (not shown) that fastens the sound diffuser 30 between the first driver 10 (the first cavity 11) and the second driver 20 (the second cavity 21) is not displayed may be implemented by using any structure design that can accommodate the sound diffuser 30 in this application and satisfy a sound diffusion function requirement thereof.
For example, the first driver 10 may be a woofer, and a sound production direction of the woofer faces toward the sound diffuser 30. In an embodiment, a sound frequency range of the first driver 10 is approximately 40 Hz to 2,000 Hz. The first driver 10 has a first vibration film 13, and at a location close to its outter edge, there is a coaxially disposed round first folding ring 131 that protrudes toward the sound diffuser 30. A sound production frequency of the second driver 20 is different that of the first driver 10. For example, the second driver 20 may be a tweeter, and a sound production direction thereof faces toward the sound diffuser 30. In an embodiment, a sound frequency range of the second driver 20 is approximately 2,000 Hz to 20,000 Hz. The second driver 20 has a second vibration film 23, and at a location close to its outter edge, there is a coaxially disposed round second folding ring 231 that protrudes toward the sound diffuser 30.
The first diffusion surface 31 has a first central area 310 that is a circular protrusion, a first outer ring region 312 that is approximately horizontal flat, and a first concave ring region 311 located between the first central area 310 and the first outer ring region 312. The first central area 310, the first concave ring region 311, and the first outer ring region 312 of the first diffusion surface 31 smoothly transit at adjacent locations thereof, and are mutually coaxially disposed corresponding to the first vibration film 13 of the first driver 10. At least one part of the first central area 310 of the first diffusion surface 31 is corresponding to a cambered surface of the first vibration film 13 of the first driver 10. A location of the first diffusion surface 31 is a maximum physical stroke location corresponding to the first vibration film 13 of the first driver 10, that is, a vertical distance between the first diffusion surface 31 and the first folding ring 131 is equal to or greater than a maximum physical stroke generated by the first folding ring 131.
The second diffusion surface 32 is in the shape of a circular dish surface protuberant from center outwards. The second diffusion surface 32 has a second central area 320 that is a circular protrusion, an approximately horizontal second outer ring region 322 and a second concave ring region 321 located between the second central area 320 and the second outer ring region 322. The second central area 320, the second concave ring region 321, and the second outer ring region 322 of the second diffusion surface 32 smoothly transit at adjacent locations thereof, and are mutually coaxially disposed corresponding to the second vibration film 23 of the second driver 20.
A sound wave (for example, a bass sound wave) that is toward the sound diffuser 30 from the first driver 10 is diffused outward (for example, horizontally diffused outward), and the first diffusion surface 31 of the sound diffuser 30 changes a direction of the sound wave. Similarly, a sound wave (for example, a treble sound wave) that is toward the sound diffuser 30 from the second driver 20 is diffused outward (for example, horizontally diffused outward), and the second diffusion surface 32 of the sound diffuser 30 changes a direction of the sound wave.
Referring to both
Referring to both
Referring to both
Referring to both
It can be learned from
Referring to
where, c is a sound speed, S is areas of openings in the neck (that is, areas of the individual openings 313a, 313b, 313c, 313d, 313f, and 313e), L is an effective length of the neck (that is, a depth of the individual openings 313a, 313b, 313c, 313d, 313f, and 313e), and V is a volume of a cavity (that is, a hollow volume of the sound diffuser 30).
In
By performing a simulated test by replacing the sound diffuser 30 in
It can be learned from simulated sound pressure level curves in
According to the speaker 1 and the sound diffuser 30 thereof of this disclosure, sound waves from both the first driver 10 and the second driver 20 can be simultaneously diffused, and the mutual impact between sound fields in the two sound production spaces of the first driver 10 and the second driver 20 can be reduced to the minimum, so that an optimal acoustic characteristic is achieved for the speaker 1.
Although this application is disclosed above by using the embodiments, the embodiments are not used for limiting this application. Any person skilled in the art may perform some modifications and improvements without disobeying the spirit and scope of this application. Therefore, the protection scope of this application should be subject to the scope defined by the claims.
Claims
1. A sound diffuser, applied to a speaker, and the sound diffuser comprising:
- a first diffusion surface, facing toward a first driver, wherein the first diffusion surface comprises a first central area with a circular protrusion, a first outer ring region, and a first concave ring region located between the first central area and the first outer ring region; and
- a second diffusion surface, facing toward a second driver, wherein the second diffusion surface comprises a circular dish surface protuberant from center outwards,
- wherein the first diffusion surface has an opening and the second diffusion surface is free from any opening, and
- wherein the sound diffuser is coaxially located between the first driver and the second driver, and the first driver and the second driver respectively generate different sound frequencies.
2. The sound diffuser according to claim 1, wherein the first driver comprises a first folding ring, wherein a vertical distance between the first diffusion surface and the first folding ring is equal to or greater than a maximum physical stroke generated by the first folding ring.
3. The sound diffuser according to claim 2, wherein the second diffusion surface comprises a second central area, which is a circular protrusion, and a diameter of the first central area of the first diffusion surface is greater than the second central area of the second diffusion surface.
4. The sound diffuser according to claim 3, wherein the second diffusion surface has a second concave ring surface, and a diameter of the second concave ring surface is less than a diameter of the first concave ring region of the first diffusion surface.
5. The sound diffuser according to claim 2, wherein the second diffusion surface comprises a second central area, which is protuberant in a pointed cone.
6. The sound diffuser according to claim 2, wherein the second diffusion surface comprises a second central area, which is protuberant in a straight cone.
7. The sound diffuser according to claim 2, wherein the second diffusion surface comprises a second central area, which is protuberant in a circular convex cone.
8. The sound diffuser according to claim 2, wherein the sound diffuser is hollow, and the first diffusion surface has a plurality of openings.
9. The sound diffuser according to claim 8, wherein inner surfaces or outer surfaces of the plurality of openings of the first diffusion surface comprise damping layers.
10. A speaker, comprising:
- a first driver;
- a second driver, wherein a sound frequency generated by the second driver is different from that of the first driver; and
- a sound diffuser according to claim 1.
4134471 | January 16, 1979 | Queen |
4348549 | September 7, 1982 | Berlant |
5115882 | May 26, 1992 | Woody |
5673329 | September 30, 1997 | Wiener |
5721401 | February 24, 1998 | Sim |
5995634 | November 30, 1999 | Zwolski |
6257365 | July 10, 2001 | Hulsebus, II |
6603862 | August 5, 2003 | Betts |
20030179899 | September 25, 2003 | Welker |
20040020711 | February 5, 2004 | China |
20120201403 | August 9, 2012 | Tan |
20160227315 | August 4, 2016 | Kim |
20170064421 | March 2, 2017 | Matsumura |
20170303034 | October 19, 2017 | Sullivan |
20200053454 | February 13, 2020 | Pan |
20200158866 | May 21, 2020 | Liu |
4331959 | October 1996 | DE |
518668 | December 1992 | EP |
0605224 | July 1994 | EP |
3066673 | November 2018 | FR |
2310565 | August 1997 | GB |
2317532 | March 1998 | GB |
2459338 | October 2009 | GB |
WO-2011053248 | May 2011 | WO |
WO-2015094115 | June 2015 | WO |
Type: Grant
Filed: Apr 16, 2019
Date of Patent: Jul 19, 2022
Patent Publication Number: 20190327554
Assignee: TYMPHANY ACOUSTIC TECHNOLOGY (HUIZHOU) CO., LTD. (Huzhou)
Inventors: Zhengmin Wang (Huizhou), Le Pan (Huizhou), Xiangfeng Jin (Huizhou)
Primary Examiner: Edgardo San Martin
Application Number: 16/385,563
International Classification: H04R 1/34 (20060101); H04R 1/32 (20060101); G10K 11/26 (20060101); H04R 1/20 (20060101);